personally i feel that the happy medium between âzuko knows zero cursewordsâ vs. âzuko knows cursewords that would send toph into frenzies of delight and cause aang to astroproject himself straight to the spirit worldâ is âzuko can, if suitably provoked, swear with the mouth of a sailor on leave, but would never dare curse in front of iroh because heâs been brought up to have better manners than that, and shocking and disappointing his elderly uncle by the liberal application of foul language is a line that has not yet occured to zuko to consider crossingâ with the addendum of âand zuko learned the filthiest and most shocking turns of phrase while listening to iroh playing pai sho with lieutenant jee in the boiler room when they thought he was asleep in his cabinâ